US 2012/0075051 A1 · Magnetic Devices and Transformer Circuits Made Therewith

Abstract

A magnetic device producing a small amount of leakage flux and capable of substantially eliminating the amount of leakage flux that escapes the magnetic core of the device. The device includes at least a portion of an electronic circuit that includes an interphase transformer arranged on a magnetic core. The reactor windings on each leg of the magnetic core are disposed in close proximity to each other and can be wound concentrically or in a bifilar fashion. The resulting combination of the magnetic core and windings provides a high degree of magnetic coupling between reactor windings disposed on the same leg and between reactor windings disposed on differing legs. The high degree of magnetic coupling substantially reduces the amount of leakage flux that can affect other metal objects proximate the magnetic device.

Claims20

Dependent claims

A magnetic device for a multiphase power converter that includes a number N of switching cells having corresponding respective N switched outputs, the magnetic device comprising:

a core including N legs;
pairs of reactor windings each including a primary reactor winding and a secondary reactor winding, said pairs of reactor windings disposed on corresponding respective ones of said N legs, wherein said primary reactor winding and said secondary reactor winding of each respective pair of reactor windings are separated by a distance that substantially eliminates leakage inductance, and wherein each of said pairs of reactor windings have an output in electrical communication with a common output node;
and
N double-winding segments each including a primary reactor winding from one of said pairs of reactor windings in series with a secondary reactor winding from another one of said pairs of reactor windings, each of said N double-winding segments having a first end electronically connected to a corresponding respective one of said N switched outputs and a second end electronically connected to said common output node.

1 more element

Dependencies are inferred from the claim text.

Magnetic Devices and Transformer Circuits Made Therewith

Life of this patent

Magnetic Devices and Transformer Circuits Made Therewith

Life of this patent

Abstract

Claims20